Apparatus for distilling oil



May 17, 1932. s. SEELIG APPARATUS FOR DISTILLING OIL Filed Aug. 15. 1928 //7 yen for: Qe/fg Patented May 17, 1932 UNITED STATES SIGBER-T SEE-L1G, or BERLIN-QHAR QTTE B BG, GnRM nY I APPARATUS FOR nrs'rl'rliiine 011.

Application filed August 13, 1928, Serial No. 299,316, and'in cementu 20, 1927.

IVith the methods known hitherto of distilling oils with the help of a metal bath the oil, having been heated before, was led into the reaction vessel filled with hot metal.

l; The oil rose through the hot metal to the surface and was then led away from the reaction space. In thisway the oil collecting in the space above the metal bath was bound to come into contact with the wall of the reac- 2; tion vessel which, being heated from outside and destined to communicate the heat to the metal bath in the reaction vessel, is very hot.

It is however very harmful for the oil which has passed the metal bath to come into contact with the hot wall, because by so doing coke easily separates and may cause the apparatus to get clogged. 7

According to the present invention this ditliculty is overcome by preventing the oil particles leaving the metal bath from touching the hot wall of the reaction vessel. That can be attained for instance by inserting into the reaction vessel from above a tube reaching into the metal bath and being provided at the upper end with openings for the sake of equalizing the pressure, see illustration. In the accompanying drawing an apparatus is shown in vertical section and suitable for carrying out the invention. A is the wall of the reaction vessel, B is the inserted tube descending into the hot metal at C. At the upper end E this tube B has apertures to bring about equalization of pressure. This tube B is spaced from the surrounding wall of the vessel A, thus forming a space D therebetween.

The process is as follows:

The oil to be distilled passes through the hot metal into the chamber G above the level of the lead bath and inside the tube B. The wall of this chamber G space is protected against the heat of the wall A of the reaction vessel by the air lying between them in the space D. The air being a poor heat conductor, the temperature of the tube wall is considerably lower than the temperature of the wall of the reaction vessel, which means that the oil after leaving the hot metal will not longer be heated and thus the separation of coke is avoided. A feed tube V terminating with coils W is suspended by means of a plu or closing member U at the upper end of die Vessel. A collecting pipe Fis similarly mounted in the member U ofheat insulating material. The lower end of this pipe terminates just above the surface of the molten metal G.

The process can also be brought about by making a cooling medium, for instance air, circulate in the air space D between the tube and the wall of the reaction vessel, thus providing a further cooling.

Still another way to carry out this process is to extend the tube B down quite close to the bottom of the reaction vessel and to construct the tubular coils marked W at the end of the feed pipe V in the illustration, and through which the oil is sent into the hot metal, in such a manner that the single coils W touch each other. In this manner is avoid ed a current of the hot metal, which occurs on account of the lateral apertures with old methods. It has been found that such a current is superfluous and harmful, because by far the greater part of the heat is communicated, not through this current, but through convection. The current always carries with it the danger that particles of the oil touching the overheated outer wall become decomposed, thereby separating coke. The described closing of'the reaction space against the outside prevents any current, allowing the heat to enter only through convection. The coils lying close together are fed with a-cooling medium, oil for instance, which prevents excess of heat entering the space.

Attention is called here to the fact that the methods as described above are examples only.

WVhat I claim is An apparatus for distilling oil, comprising a reaction vessel externally heated, a plug of insulating material closing the upper open end of said vessel, a tubular member suspended from said plug and spaced from the bottom of the vessel, an annular space being formed between the walls of said member and the vessel, pressure equalizing perforations being provided in said tube near said plug forming intercommunication between said space and the interior chamber in said memher, a molten metal bath in the chamber part- 1y filling said chamber to a height considerably below said perforations in said tubular member, a feed pipe carried in said plug and terminating with tightly packed helical coils below the surface of' id bath, and a vapor collecting pipe for the refined oil also carried in the plug and terminating with its lower end adjacent to the surfaceof the bath. a

In testimony whereof I have my.

name to this specification. 

